Topcon BM-7A, Инструкция по эксплуатации

Страница: 15 / 96

1. Before Use
13
■Panel Switches
The function of each of the switches is as described below.
AUTO/MANU Switch
This switche is used to select AUTO or MANUAL measurement ranges.
The range is set to AUTO when the power is ON.
AUTO range: Automatically sets the measurement range according to the brightness of the
object being measured.
MANUAL range: Performs measurement in the measurement range set in the function mode.
Used when using analog output.
Factory default setting is range 3.
FAST/SLOW Switch
This switch is uded to select the response speed of the photo-receiver circuit. The response
speed is the time required for the analog output of the instrument to reach 90% of the peak value
when measuring an LED driven by a square wave from a function generator.
SLOW is set when the power is ON, and SLOW is used for normal measurement.
FAST : The response speed of the photo-receiver circuit is increased.
This is set when measuring fixed light such as the sun or halogen lamp, and a light
source having high frequency lamp such as a LCD.
Set when measuring a flashing light source and analog output is connected to an
oscilloscope. (Analog output is only used for analog output model.)
The response speed differs depending on the measurement range (30 milliseconds
to 1 millisecond).
SLOW : The response speed of the photo-receiver circuit is decreased.
This is used for normal measurement such as measuring fixed light, and flashing
light such as high-frequency flashing light, fluorescent light, and a CRT.
Set when recording waveforms of analog output using a pen recorder.
LCD
AUTO/MANU
switch
RUN/HOLD switch
FAST/SLOW switch
LIGHT switch
MODE switch
CAL switch